Backlight module and LCD comprising the same

Abstract

A backlight module comprises a backplate having a baseplate and side plates, a direct-lit LED array, edge-lit LED arrays and a light guide panel. The light guide panel is located above the baseplate. The direct-lit LED array is disposed between the baseplate and the light guide panel. The edge-lit LED arrays are disposed at two sides of the light guide panel and facing light incident surfaces thereof respectively. Light scattering structures for scattering light rays are disposed on a light exiting surface or on a bottom surface of the light guide panels. With the LED arrays and the light scattering structures, the light guide panel is divided into three backlight regions. Displaying of the backlight module is controlled region by region by the light scattering structures and the LED drive circuit to improve the brightness of the backlight module and reduce the power consumption of the liquid crystal module.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]This is a continuation of non-provisional application No. 13 / 376,837, filed on Dec. 7, 2011 and entitled “BACKLIGHT MODULE AND LCD COMPRISING THE SAME”.BACKGROUND[0002]1. Technical Field[0003]The present disclosure relates to the technical field of liquid crystal 5 displaying, and more particularly, to a backlight module and a liquid crystal display (LCD) comprising the same.[0004]2. Description of Related Art[0005]LCDs currently available all comprise a liquid crystal module and a backlight module adapted to provide backlight for a liquid crystal panel of the liquid crystal module. Because the liquid crystal panel does not emit light by itself, the backlight module must provide a uniform light source having adequate brightness to the liquid crystal panel so that the liquid crystal panel operates to display an image normally.[0006]However, conventional liquid crystal modules using backlight have an invariable power consumption during oper...

AI Technical Summary

Benefits of technology

This patent is about a new backlight module and LCD display that aim to save power and improve brightness adjustments. The backlight module uses a combination of direct-lit and edge-lit designs, and various light scattering structures are placed on the light guide panel to control the brightness in different regions. This results in better control of the backlight and reduced power consumption.

Problems solved by technology

However, conventional liquid crystal modules using backlight have an invariable power consumption during operation; that is, brightness of the backlight cannot be adjusted according to brightness of an image to be displayed by the liquid crystal module.

In other words, the brightness of the backlight cannot be adjusted region by region, and this is unfavorable for energy saving.

However, this way of splicing light guide panels together causes problems of nonuniform brightness and chromaticity at splicing gaps.

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